# What is the amount of energy it takes to remove an electron from an atom?

Aug 21, 2016

Well, normally this describes the ionization energy of an atom.

#### Explanation:

${\text{Atom(g)"+Deltararr"Atom}}^{+} \left(g\right) + {e}^{-}$

The amount of energy expended is the ionization energy of the atom.